Collapsible paper box



Sept 17, 1940. GU'YER 2,214,813

coLpAPsIBLE PAPER Box" Filed Aug. 27, 1937 2 Sheets-Sheet 1 28 a 24 57 so 'Regnolds Guger Sept. 17, 1940; R. .GUYER 2,214,813

GOLLAPSIBLE PM!!! Box Filed Aug. 27, 193; 2 Sheets-Sheet z Fici 4 Regnold (Buyer Patented Sept. 17,1940

COLLAPSIBLE PAPER BOX Reynolds Guyer, St; Paul, Minn., assignor to Waldorf Paper Products Company, St. Paul, Minn., a corporation 91 Minnesota Application August 27, 1937, Serial No. 161,249

Claims.

My invention relates to collapsible boxes and particularly to cartons constructed of paper or similar material.

An object of the invention resides in providing 5 a box or carton in which the tendency of spreading of the walls of the carton beyond parallel is greatly reduced.

Another object of the invention resides in providing a carton which, when first erected, has two I of the opposed walls thereof converging or toeing inwardly and which when the carton is filled are shifted into parallelism.

A still further object of the invention resides in providing flaps formed onthe walls adjacent 16 the converging walls and adapted to fold in between the converging walls and in constructing said flaps of such dimension as to force the converging walls outwardly .into parallelism.

Other objects of the invention reside in the m various forms of construction by means of which the walls of the carton are locked in erected position.

Still further objects of the invention reside in the novel combination and arrangement of parts and in the details of construction hereinafter illustrated and/ or described.

In the drawings: Fig. 1 is a" perspective view of a carton illustrating an embodiment of my invention and showing the walls in erected position. v

Fig. 2 is a View of the structure shown in Fig. 1 with the walls in collapsed position- Fig. 3 is a developed view of the blank from which the carton, shown in Figs. 1 and 2 is conmi structed.

Fig. 4 is a sectional view of the carton with the' closure flap raised and taken on line 44 of Fig. 1.

Fig. 5 is a view similar to Fig. 4 showing the 40 looking flap in locking position.

In the use of collapsible cartons and particularly cartons of the telescopic type considerable inconvenience is' encountered in assembling the parts of the carton due to the spreading of the {,1 walls of the inner part occasioned by the filli of the contents therein. In addition an unsightly carton results when the walls of the same spread.

The present invention overcomes these difficulties by'providing a carton in which the walls subject so to spreading normally toe inwardly or converge wheniirst erected and which assume a parallel relation when the carton is in use. The various forms of my invention will now be described in detail. 7

55' In Figs. 1 to 5 I have shown a carton which is constructed from a blank illustrated in Fig. 3. This blank is designated in its entirety by reference numeral 12 and is constructed from cardboard or any paper product or from any other suitable material. This blank is provided with a 5 number of transverse scores l3, l4, I5, 16,. I1 and I8 and with a number of longitudinal scores I9, 20, 2|, and 22 which form in the blank a bottom 23, side wall sections 24 and 25, end wall sections 26 and 21, corner sections 28, 29, 30 and 3| as 10 well as flaps 32, 33, 34 and- 35 which issue from the side and end wall sections.

The corner sections 28, 29, 30 and 3| of blank 12 are formed with diagonal scores 36 which provide triangularly shaped corner portions 31 at u the ends of the same. The corner sections 28, 29, 30 and 3| are connected to the side wall sections 24 and 25 through scores 15 and I6, and in this form of the invention are also connected to the end wall sections 26 and 21 through the scores 2| and 20. In this and in the other forms of the in-- vention these corner sections have been referred to as issuing from the side wall sections of-the carton and secured to the end wall sections, though it can be readily comprehended the con- 25 struction can be reversed and the corner sections cause to issue from the end wall sections and be secured to the side wall sections by separate means.

In the fabrication of the carton, the corner portions 31, of the corner sections 28, 29, 30, 3|

and the flaps 33 and 35 are first coated with adhesive as indicated at 38 and 39 throughout their entire extent. The flaps 35 and 33 are next folded along the scores l9 and 22 and caused to ad- 35 here to the side wall sections 25 and 24. This forms the side walls of the carton which are indicated at 46 and 41. The portions of the blank outwardly of the scores 20 and 2| are thereafter folded back upon the intervening portion of the blank and the'triangularly shaped corner portions 31 secured to the end wall sections 26 and 21. The form of the carton, after this operation has been completed, is shown in Fig. 2. The car ton is now ready for use. v

In erecting'the carton the side walls of the carton are moved up and away from the bottom' 23 and brought into erected position. Since the end wall sections 26 and 21 are connected tothe side wall sections through the corner sections, 50 said end wall sections follow with the side wall sections and are also moved into erected position. During "this operation the corner sections fold along the scores 36.and the carton takes the form shown in Fig. 4. Flaps 32 and 34 are next swung 55 inwardly along the scores l3, l4, l1 and I8 so that the same overlie the end wall sections 26 and 21.

By means of the flaps 32 and 34 and end wall sections 26 and 21 the end walls 48 and 49 are formed. It will be noted that the carton has walls of double thickness throughout and that the exposed edges thereof are rounded.

The two flaps 32 and 34 are held locked within the interior of the carton by means of the following construction: along the edges of the flaps 33 and 35 are formed recesses 4| which, when the flaps are secured to the corresponding side wall sections, form grooves between the ends of said flaps and the corner sections of the carton. The flaps 32 and 34 are of a length equal to the width of the carton between the side wall sections 24 and 25 and are formed with notches 42 adjacent the scores l4 and H which leave tongues 43 adjacent said notches. When the flaps 32 and 34 are folded in .to position the tongues 43 engage within the grooves 4| and become locked in place.

The scores l3 and I8 form on the ends of the flaps 32 and 34, flanges 44 and 45 which are adapted to overlie the bottom 23 of the carton. The tongues 43 extend throughout these flanges and are adapted to extend beneath the lowermost edges 46 of the flaps 35 and 39 and to further assist in holding the carton in erected position.

The objectionable features of cartons, as previously described, namely, spreading of the walls thereof is overcome in my invention as follows. The scores 36 commence at the intersections of scores l5, I6, 20 and 2i and as viewed in Figure 2 extend toward one another and form with the portions of the scores I5 and VHS extending across the bottom 23 angles less than 45 degrees. This causes the sides 46 and 41 to toe inwardly or to tend to converge toward their upper ends as shown in Figure 4 when the carton is first erected. In the construction of the hinges formed by the scores 36 considerable yield results which readily permits of the carton expanding when loaded to a degree such that the walls of the carton would diverge. The formation of the scores 36 compensates for such expansion. Where the carton is constructed with looking flaps as designated at 32 and 34, these flaps,

when folded into the interior of'the carton' spread the side wall sections as shown in Figs.

- 1 and 5. The walls 46 and 41 take up the slack in the hinges so that the carton when completely erected has a rectangular shape which is so maintained even after loading.

As previously stated the invention is particularly applicable to telescopic types of carton. Since both parts of such carton are similar, only one of the parts of the carton has been shown in the drawings. It can, however, be readily comprehended that another part is utilized, of slightly larger dimensions, which receives the part illustrated and which parts together comprises the structure in its entirety. If desired the invention may be used as a tray or as a complete container and other closing means employed for closing the open portion of the same.

The advantages of my invention are manifest. An extremely neat and attractive construction is provided in which the falls of the carton are prevented from spreading beyond parallelism. The parts of the carton are so constructed where a telescopic carton is utilized that the same readily telescope when the bottom is filled, thereby eliminating inconvenience to the user. The various walls of the carton are rigidly held in position by the various locking devices and remain permanently in position until disengaged.

Changes in the specific form of my invention, as herein disclosed, may be made within the scope of what is claimed without departing from 1 the spirit of my invention.

Having described my invention, what I claim as new and desire to protect by Letters Patent is:

1. A collapsible box comprising a bottom, a pair of side wall sections hingedly connected to the lateral edges of said bottom, a pair of end wall sections hingedly connected to the end edges of said bottom, corner sections hingedly connected to the end sections and hingedly connected to the side sections, said corner sections having diagonal hinges therein and guiding the walls of the carton for movement from collapsed to extended position, the axes of said hinges ex.- tending through the corners of the bottom toward one another and forming angles less than -45 degrees with the end edges of the bottom, said hinges causing the side walls to converge when the box is erected and means for engaging the side walls and forcing the same into parallelism. 1

\ 2. A collapsible box comprising a bottom, a pair of side wall sections hingedly connected to the lateral edges of said bottom, a pair of end wall sections hingedly connected to the end edges of said bottom, means for hingedly connectingto an erected position said hinge means being yieldable to cause the side wall sections to spread upon use of the box, said hinge means being v formed to bring said side walls into converging relation when first erected and means carried by the end wall sections for forcing the side walls into parallelism.

3. A collapsible carton constructed from a blank having longitudinal and transverse scores forming a bottom, side wall sections, end wall sections, corner sections issuing from said side wall sections and flaps issuing from said end wall sections, said corner sections being adapted to overlap said end wall sections when the side wall sections are folded upon the bottom, certain of said overlapping sections being formed with diagonal scores extending in converging relation when the carton is collapsed and making with the transverse scores of the blank angles less than 45 degrees, said diagonal scores forming at the ends 'of the sections in which said diagonal scores are disposed, triangular shaped corner portions, said corner portions being secured to the adjacent sections, said diagonal scores causing the side wall sections of the carton to toe inwardly when the carton is first erected, said flaps being adapted to be swung inwardly and between the side wall sections, said flaps being of a width sufficient to force the side wall sections into parallelism when swung in place, and locking means formed on said flaps.

4. A collapsible carton constructed from a blank having longitudinal and transverse scores forming a bottom, side wall sections, end wall sections, corner sections issuing from said side wall sections, flaps issuing from said end wall sections and other flaps issuing from said side wall sections, said corner sections being adapted,

lation when the carton is collapsed and making with the transverse score of the blank angles less than 45 degrees, said diagonal scores forming at the ends of the section in which said diagonal scores are disposed triangular shaped comer portions, said corner portions being secured to the adjacent sections, said diagonal scores causing-the side wall sections of the carton to toe inwardly when the carton is first erected, said second-named flaps being adapted to be folded back upon said side wall sections within the interior of the carton, said first-named flaps being adapted to be swung inwardly and between the second-named flaps and side wall sections, said second-named flaps falling short of the corner section to form grooves therebetween said firstnamed flaps being of a width suiiicient to force the side wall sections into parallelism when swung in place and being received in said grooves blank having longitudinal and transverse scores forming a bottom, side wall sections, end wall sections and corner sections issuing from the side wall sections and connected to both the side wall sections and end wall sections, said corner sections and said end wall sections being adapted to overlap one another when the side wall sections are folded upon the bottom, certain 01' said overlapping sections being formed with diagonal scores extending in converging relation when the carton is collapsed and making with thetransverse scores of the blank angles less than 45 degrees, said diagonal scores forming at the ends of the sections in which said scores are disposed triangular shaped comer portions, said corner portions being secured to the overlapping sections, said diagonal scores causing the side wall sections of the carton to toe inwardly when the carton is first-erected, and means forforcing said side wall sections into parallelism.

REYNOLDS GUYER. 

